W3School TIY Editor
W3School 在线教程
改变方向
暗黑模式
运行代码
<!DOCTYPE html> <html> <body> <p>单击这个按钮可按升序循环遍历数组的索引。</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var cars = ["BMW", "Volvo", "Saab", "Ford"]; var text = ""; var i = 0; while (i < cars.length) { text += cars[i] + "<br>"; i++; } document.getElementById("demo").innerHTML = text; } </script> </body> </html>